package com.xingbg.projectimpl.provider.business.utils;

import lombok.extern.slf4j.Slf4j;
import org.springframework.util.ResourceUtils;
import org.yaml.snakeyaml.Yaml;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

/**
 * @author hunmeng
 * @create 2020-01-10 20:34
 */
@Slf4j
@Deprecated
public class YmlUtils {

    public static final String BOOTSTRAP_FILE = "classpath:application.yml";

    private static Map<String, String> result = new LinkedHashMap<>();

    /**
     * 根据文件名获取yml的文件内容
     *
     * @param filePath
     * @param keys     第一个参数对应第一个key，第二个参数对应第二个key 比如spring.name下的所有 就是两个参数、
     *                 getYmlByFileName(bootstrap_file,"spring", "name");
     * @return
     */
    public static Map<String, String> getYmlByFileName(String filePath, String... keys) {
        result = new HashMap<>();
        if (filePath == null) filePath = BOOTSTRAP_FILE;
        InputStream in = null;
        try {
            File file = ResourceUtils.getFile(filePath);
            in = new BufferedInputStream(new FileInputStream(file));
            Yaml props = new Yaml();
            Object obj = props.loadAs(in, Map.class);
            Map<String, Object> param = (Map<String, Object>) obj;

            for (Map.Entry<String, Object> entry : param.entrySet()) {
                String key = entry.getKey();
                Object val = entry.getValue();
                if (keys.length != 0 && !keys[0].equals(key)) {
                    continue;
                }
                if (val instanceof Map) {
                    forEachYaml(key, (Map<String, Object>) val, 1, keys);
                } else {
                    result.put(key, val.toString());
                }
            }
            return result;
        } catch (FileNotFoundException e) {
            log.error(e.getMessage(), e);
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    log.error(e.getMessage(), e);
                }
            }
        }
        return null;
    }

    /**
     * 根据key获取值
     *
     * @param key
     * @return
     */
    public static String getValue(String key) throws FileNotFoundException {
        Map<String, String> map = getYmlByFileName(null);
        if (map == null) return null;
        return map.get(key);
    }


    /**
     * 遍历yml文件，获取map集合
     *
     * @param key_str
     * @param obj
     * @param i
     * @param keys
     * @return
     */
    public static Map<String, String> forEachYaml(String key_str, Map<String, Object> obj, int i, String... keys) {
        for (Map.Entry<String, Object> entry : obj.entrySet()) {
            String key = entry.getKey();
            Object val = entry.getValue();
            if (keys.length > i && !keys[i].equals(key)) {
                continue;
            }
            String str_new = "";
            if (key_str != null && !"".equalsIgnoreCase(key_str)) {
                str_new = key_str + "." + key;
            } else {
                str_new = key;
            }
            if (val instanceof Map) {
                forEachYaml(str_new, (Map<String, Object>) val, ++i, keys);
                i--;
            } else {

                result.put(str_new, val.toString());
            }
        }

        return result;
    }


    /**
     * 获取bootstrap.yml的name
     *
     * @return
     */
    public static String getApplicationName() throws FileNotFoundException {
        return getYmlByFileName(BOOTSTRAP_FILE).get("server.port");
    }

    /**
     * 获取bootstrap.yml的name
     *
     * @return
     */
    public static String getApplicationName1() throws FileNotFoundException {
        String name = getYmlByFileName(BOOTSTRAP_FILE).get("spring.application.name");
        return name + "center";
    }

    public static void main(String[] args) throws FileNotFoundException {

        Map<String, String> ymlByFileName = getYmlByFileName(BOOTSTRAP_FILE, "spring");
        Set<Map.Entry<String, String>> entries = ymlByFileName.entrySet();
        for (Map.Entry<String, String> entry : entries) {
            System.out.println(entry.getKey() + "===" + entry.getValue());
        }

        System.out.println(getApplicationName());
    }
}